ADT7473ARQZ データシートの表示（PDF） - Analog Devices
部品番号
コンポーネント説明
メーカー
ADT7473ARQZ Datasheet PDF : 76 Pages
| |||
ADT7473
TABLE OF CONTENTS
Features .............................................................................................. 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Specifications..................................................................................... 4
Timing Diagram ........................................................................... 5
Absolute Maximum Ratings............................................................ 6
Thermal Resistance ...................................................................... 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics ............................................. 8
Product Description....................................................................... 10
Comparison Between ADT7467 and ADT7473 .................... 10
How to Set the Functionality of Pin 9...................................... 10
Recommended Implementation............................................... 10
Serial Bus Interface..................................................................... 11
Write Operations ........................................................................ 12
Read Operations ......................................................................... 13
SMBus Timeout .......................................................................... 13
Voltage Measurement Input...................................................... 13
Analog-to-Digital Converter .................................................... 13
Input Circuitry............................................................................ 13
Voltage Measurement Registers................................................ 13
VCCP Limit Registers ................................................................... 14
Additional ADC Functions for Voltage Measurements ........ 14
Temperature Measurement Method ........................................ 15
Series Resistance Cancellation.................................................. 17
Factors Affecting Diode Accuracy ........................................... 17
Additional ADC Functions for Temperature Measurement 19
Limits, Status Registers, and Interrupts....................................... 20
Limit Values ................................................................................ 20
Interrupt Status Registers .......................................................... 21
THERM Timer ........................................................................... 23
Fan Presence Detect................................................................... 31
Sleep States .................................................................................. 31
XNOR Tree Test Mode .............................................................. 31
Power-On Default ...................................................................... 31
Programming the Automatic Fan Speed Control Loop ............ 33
Automatic Fan Control Overview............................................ 33
Step 1: Hardware Configuration .............................................. 34
Step 2: Configuring the Mux .................................................... 36
Step 3: TMIN Settings for Thermal Calibration Channels ...... 38
Step 4: PWMMIN for Each PWM (Fan) Output ...................... 40
Step 5: PWMMAX for PWM (Fan) Outputs.............................. 40
Step 6: TRANGE for Temperature Channels................................ 41
Step 7: TTHERM for Temperature Channels ............................... 44
Step 8: THYST for Temperature Channels.................................. 45
Dynamic TMIN Control Mode ................................................... 47
Step 9: Operating Points for Temperature Channels............. 49
Step 10: High and Low Limits for Temperature Channels ... 50
Step 11: Monitoring THERM ................................................... 52
Enhancing System Acoustics .................................................... 53
Step 12: Ramp Rate for Acoustic Enhancement..................... 55
Register Tables ................................................................................ 58
Outline Dimensions ....................................................................... 76
Ordering Guide .......................................................................... 76
Rev. A | Page 2 of 76
Share Link: 